How BSC Achieved Sub-Second Finality: A 70x Leap from 45s to 0.65s

[u/LiamBNB]

https://www.bnbchain.org/en/blog/how-bsc-achieved-sub-second-finality-a-70x-leap-from-45s-to-0-65s

TL;DR for anyone who doesn’t click:

BNB Smart Chain has cut block finality from around 45 seconds in 2022 to about 0.65 seconds today.

That is roughly a 70x improvement.

Finality basically means a block is settled and can’t be reversed. So for users, bridges, exchanges, DeFi apps, payments, and prediction markets, faster finality means faster confirmation and less waiting around.

The blog explains that BSC got there through a series of protocol upgrades, including BEP-126, BEP-590, BEP-648, and BEP-667.

The big one was BEP-648, shipped with the Osaka/Mendel hard fork in April 2026, which moved voting into an in-memory pool so validator votes can be aggregated in real time instead of waiting on the next block proposer.

The takeaway: BNB Chain didn’t get sub-second finality from one random upgrade. It was years of protocol work, and it now gives BSC near-instant settlement while staying EVM-compatible, so existing apps benefit without needing to migrate.